g-C3N4/ZrO2 composite material: A pre-eminent visible light-mediated photocatalyst for rhodamine B degradation in the presence of natural sunlight

被引:25
作者
Chand, Sudip [1 ]
Mondal, Aparna [1 ]
机构
[1] Natl Inst Technol, Dept Chem, Rourkela 769008, Odisha, India
关键词
Graphitic carbon nitride; Zirconium oxide; Composite; Photodegradation; Sunlight; GRAPHITIC CARBON NITRIDE; DOPED G-C3N4; ZRO2; ZRO2/G-C3N4; FABRICATION; RHB; H-2;
D O I
10.1016/j.ceramint.2022.10.065
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Fast charge recombination rate and low visible light response have always been the main restricting factor to the photocatalytic performance of graphitic carbon nitride (g-C3N4). The use of semiconductors to construct com-posites with g-C3N4 has been shown to be an effective way to boost the photocatalytic activity of g-C3N4. In this work, g-C3N4/ZrO2 composite photocatalyst was prepared by simple sonication method using synthesized g-C3N4 and hydrothermally synthesized zirconium oxide (ZrO2) nanoparticles. The photocatalytic activity of as-prepared samples was investigated by Rhodamine B (RhB) degradation under sunlight. The g-C3N4/ZrO2 composites show superior degrading performance than raw g-C3N4 and ZrO2. All pure and composite materials are characterized by XRD, UV-Vis DRS, FT-IR, XPS, SEM, EDX, HR-TEM, BET, PL, and electrochemical measurements to determine the source of the high photoactivity of the g-C3N4/ZrO2 composites. The outcomes of the characterization showed that ZrO2 nanoparticles were evenly dispersed into the layer of g-C3N4. When compared to raw g-C3N4 and ZrO2, the g-C3N4/ZrO2 composites minimize charge transfer resistance and effectively prevent electron-hole recombination. It also has an effect on the band structure and boosts visible-light absorption. Simultaneously, the radical trapping experiments and ESR study exhibited that .O-2(-) and h(+) were the most active species in the catalytic process.
引用
收藏
页码:5419 / 5430
页数:12
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